Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 62 for “"in slope"”.
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A graphical comparison of designs for response optimization based on slope estimation
… of the response, and to optimize the response. Slope estimation criteria are well suited for the optimization problem. Response prediction capability has been assessed by plotting the average, maximum, and minimum prediction variances on the surface of spheres with radii ranging across the …
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Patterns of plant species richness and diversity across two habitat types in the Upper Karoo, South Africa
The Nama-Karoo biome is relatively understudied in terms of its baseline biodiversity. Apart from its rich agricultural land-use history, the region is also under pressure from the development of the Square Kilometre Array, an increased demand for cleaner energy from shale gas fracking and/or other …
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On the midwater fish faunas of Gulf Stream rings with respect to habitat differences between slope water and northern Sargasso Sea
Forty-three 1000-in oblique Isaacs-Kidd midwater trawl collections were made on six cruises. In most cases, these were accompanied by 1500-m hydrocasts and plankton tows to 800 m. The fish collections comprise 19,400 specimens in 129 species, from Slope Water, Gulf Stream, Northern Sargasso Sea, …
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A Characterization of Caffeine Imprinted Polypyrrole Electrode
Nanotechnology holds great potential for improving our lives by creating many new materials and devices in medical sciences, electronics and also in energy production. Molecularly imprinted polymers (MIPs) are highly stable synthetic polymers that possess molecular recognition properties due to …
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Low magnetic field transitions of rhenium near the critical temperature
A cryostat was constructed using conventional and superconducting shielding techniques. The ambient magnetic field at the sample was reduced to less than 10 to the -5 Gauss. For the single crystal rhenium sample isothermal magnetization curves were obtained with thermodynamic critical fields Hc …
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A comparison of oxygen utilization determination techniques for the activated sludge process
… series of batch experiments has led to the following conclusions: 1. Currently used methods of quantifying oxygen uptake rate, especially for batch reactors, yield values of oxygen utilization considerably lower than those predicted by mass balance considerations for these three wastes. In the …
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Habitat Selection by Swift Foxes in Badlands National Park and the Surrounding Area in South Dakota
<p>In fall 2003, Badlands National Park led an effort to reintroduce swift foxes (Vulpes velox) to the Park and the surrounding grasslands. To assess swift fox population viability in the region, an estimate of habitat suitability was needed. Habitat selection analyses were conducted during fall …
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Stratigraphic evolution of Las Vegas Bay, Lake Mead, Nevada: 1935--2002
Las Vegas Bay in Lake Mead, NV provides a unique mid-scale natural laboratory to study the effects changes in lake level, sediment supply, fluvial discharge and basin physiography have had on stratigraphy of the basin. Mapping, seismic, sidescan sonar and bathymetry surveys, in conjunction with …
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Discrimination of Tone Contrasts in Mandarin Disyllables by Naïve American English Listeners
<p>The present study examined the perception of Mandarin disyllabic tones by inexperienced American English speakers. Participants heard two naturally-produced Mandarin disyllables, and indicated if the two were the same or different. A small native Mandarin-speaking control group participated as …
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Corrosion by molten mixtures of sodium carbonate and vanadium pentoxide
… of corrosion of steels by slags deposited during combustion of heavy petroleum fuels which contain sodium and vanadium becomes very severe when the temperature of the metal exceeds 550 to 600°C, thus placing undesirable limitations on both the manufacturers and users of heavy fuel oil fired …
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Fluvial systems : a re-evaluation of Horton's laws
<p>The number of different order streams entering a channel of known order can be approximated by a geometric progression similar to the Law of Stream Numbers. Hence, the frequency and order of different size tributaries along any channel can be described by a single parameter. Similarly, the …
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Understanding social influence using network analysis and machine learning
… computational models of how society works. In order to make computational social science a useful reality, we will need generative models of how social influence sprouts at the interpersonal level and how it leads to emergent social behavior. In this thesis, I take steps at understanding the …
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Role of Froude supercritical flow in active margin basin-floor fans, The
This dissertation focuses on the active margin basin floor fan and tests the hypothesis that whether Froude supercritical flow and a high degree of channelization are common features in basin floor fans, even in a distal part. The Froude supercritical flow may control the architecture and …
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Erosion surfaces in northwestern Maine
In the progress of Boston University's geological mapping program in the Rangeley Lake region of northwestern Maine the occurrence of conspicuously level areas at varying, yet definite elevations was noted. Essentially horizontal or but slightly inclined areas, independent of structure and …
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The effect of probe tilt angle on the quality of scanning tunneling microscope measurements
… of probe tilt angle on the quality of Scanning Tunneling Microscopy (STM) measurements was explored. A small but consistent improvement in slope accuracy was documented lending some support to the effort to develop a new, five-axis STM capable of tilting in a controlled manner while …
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The Geomorphic Influence of Agricultural Land Use on Stream Hydraulics and Biological Function
… land use near streams frequently results in long-term disturbance to woody riparian vegetation and an alteration of reach scale geomorphic structure. Such disturbances often result in increased fine sediment input to the stream along with direct changes in channel structure. The study …
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Numerical and experimental evaluation of the erodibility of particle packings with surface treatments and spring reinforcements using the discrete element method
… two-dimensional spherical particle packings subjected to added mass surface treatments was explored using a combination of physical flume experiments and the discrete element method (DEM). Packings composed of spherical glass particles, with and without surface treatments and angled at …
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Self-regulated Learning in Doctor of Physical Therapy Students
… theories and models from which to extrapolate information regarding learning in this population, including self-regulated learning theory and adult learning models. The first aim of this study was to explore these bodies of literature and provide a compelling argument for how these theories and …
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A Comparison of Natural, Living, and Hardened Shorelines Ability to Prevent Coastal Erosion and Maintain a Healthy Ecosystem
<p>It is important to find a suitable method to protect the U.S. Gulf Coast shoreline, since its’ low elevation and the Loop current make it vulnerable to sea level rise. I focused on two manmade methods, hardened, and living shorelines, of coastal protection for when the natural marsh suffers …
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Knickpoint analysis of streams in North Dakota, South Dakota, and Nebraska
… stream profiles, seismic reflection studies, engineering studies, and historical earthquakes indicates uplift in south-central South Dakota and north-central Nebraska over the last 5-10 ma. The purpose of this study was to determine if this uplift could be detected by constructing topographic …
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